2. XML Implementation
2.1 XML Document
2.1.1. Elements
2.1.2. Attributes
2.1.3 Text
2.1.4 Empty elements
2.1.5 Well-Formed XML
2.1.6 Namespaces
2.2 XML Validation
2.2.1 Document Type Definition
2.2.2. XML Schema
2.3 Software Tools
2.4 XML Parsers
2.5 XML Query
2. XML Implementation
2.1 XML Syntax
XML Documents must follow strict format requirements formulated by W3C. This evolved from SGML, but is very different with it. A well-formed XML document fulfills these requirements including elements, attributes, text, etc.
2.1.1. Elements
Elements are the basic building blocks of an XML document, and may be thought of as containers. An element is defined with a start-tag and end-tag. Each of these tags consists of the element type name (must be a valid XML name) enclosed within a pair of angle brackets (< >) and it looks like: text Sometimes, elements with no attributes or text can also be represented as: or or
This is usually used to accommodate a predefined data structure.
The names of the elements are developer defined and must adhere to the following basic rules:
• Element name must start with a letter or an underscore (_), and not to "XML" (retained by XML);
• Element name cannot contain Spaces. The underline is often used to replace the space;
• Element name can contain any number of letters, Numbers, underscore;
• A colon (:) is not recommended, because it is usually reserved for namespace;
• Dots (.) is not recommended, as it may be a mess of the object operation;
• A hyphen (-) is not recommended, because it might confuse subtraction program (-) operator;
• All names, to distinguish between the start and end ta...
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... called mixed content;
• Empty elements, some elements do not contain any content , called empty elements. Written to / > independent label ends.
While DTDs are still in use for XML validation, it has several major limitations. First, it is not written in XML syntax; therefore, we have to learn a new syntax to develop a DTD. Second, DTD does not support namespace, limiting its extensibility, as we discussed earlier. In addition, there are no restrictions imposed character data type (such as date, time). In order to solve these problems, an XML Schema is a W3C recommendation for XML validation update document format.
2.2.2. XML Schema
XML Schema is an XML-based alternative to DTD that is used to describe the structure of an XML document and thus is utilized to validate it. The XML Schema language is also referred to as XML Schema Definition (XSD).
2.3 Software Tools
The next project deliverable is a robust, modernized database and data warehouse design. The company collects large amounts of website data and uses this data to analyze it for the company’s customers. This document will provide an overview of the new data warehouse along with the type of database design that has been selected for the data warehouse. Included in the appendix of this document is a graphical depiction of the logical design of the
Two of the pairs of two represent network and host, One identifies the network an the second part indentifies the node, or host.
T F 8. Style attributes include fonts and font sizes, number formats, and borders and
Nuccitelli, R., Guerra, E. and Fernandes, C. (2010) “Parsing XML Documents in Java using Annotations”. In XML: Aplicações e Tecnologias Associadas, 8, Vila do Conde.
Part 1. (a) Define each, (b) Explain its significance, (c) where indicated with this symbol * provide an example.
o The individual object or event we are naming has no name and belongs to no class until we put it in one.
... matrix, in which color is a scalar multiple of the the vector objects contained within the array. As such, the syntax is determined by the mathematical properties of the entities in regards to how they arranged per their ascribed traits.
All elements of a text type are present. Extra elements added and written piece exceeds expectations.
Kasdorf, B. (2014). Welcome to the metadata millenium. Book Business, 17(1), 18-23. Retrieved from http://search.proquest.com/docview/1500945974?accountid=10043
They list the type of formatting that is excepted such as Microsoft, Rich Text, a PDF, and WordPerfect. Images must be submitted on a spate file such as DOC or a PDF. Some of articles that will be consider for publication are research articles, symposium, commentary, and letter to the editor. The website also entails required sections regarding each type of article. All articles will include a Title page, an Abstract, competing interest, authors contributions, acknowledgements, and references. If applicable the articles should also include a figure legend, tables and captions, and descriptions of additional data files. All articles must be written in English and this does not include British English or a mixture of
The periodic table of elements contains one hundred eighteen elements (ptable). Each element contains extremely small particles called electrons, neutrons, and protons. Whenever an element has a differing number of neutrons than the standard element, the distinct forms of the element are called isotopes. Carbon-14 is just one isotope of carbon in our atmosphere. Fifteen isotopes of this atom actually exist, but the three kinds that occur most often are Carbon-12, Carbon-13,...
Board, Technology Strategy, Metadata production tools MAINSTREAM COLLABORATIVE R & D FUNDING Metadata production tools 2011 http://www.innovateuk.org/_assets/pdf/competition-documents/metadataproductiontoolscompetition.pdf accessed 02-01-2011
In general, if we have list of n elements, we will have the following list,
A data flow diagram (DFD) is a model which shows visual representation. The representation is comprised of information through systems, data and actors. These focus on how data is changed and being used during the process. DFD’s describes the system in many different process execution or collaboration of different process together as single process or bunch of data made into pieces are used in one or more process. The drawback of DFD is that no decisions are exposed and the processes are not sequential. To the simplest, a data flow diagram shows the flow of data in and out the system as specified in the requirement. It also gives the details of storage of information. DFD’s do not show the time taken by a process to change its state by the whole system. These are much useful for the visualization of data processing in the system, as to look what, where and to which data is being transferred. The data items may flow from internal data source to external data source or vice versa. DFD will not follow any algorithm, order of each and every execution on different circumstances.
Strict - Used when we want really clean structural mark-up, free of any tags associated with layout. It is used together with W3C's Cascading Style Sheet language (CSS) to get the font, color, and layout effects we want.